@EricaSkinner - There's no specific limit, but depending on the "heaviness" of the content you add you may run into performance issues at a particular point. But I think the best way to answer this question is to say that the actual limit is more than the number of sections that should be added to any single story. 🙂
As a best practice, stories should generally be designed as shorter pieces of content rather than long, extended compendiums to help provide a better experience for your readers. If you have a story that grows into something that feels longer than something you'd want to read, it's probably is too long for others.
One popular technique to break up a longer narrative into smaller pieces is to create several stories that serve as chapters in the larger story, and then bring them together into a collection. Here's an example from the City of Virginia Beach Public Works Department.
Owen Evans
Lead Product Engineer | StoryMaps
